The atomic radius of a hydrogen atom is:
Correct answer: B. 53 pm
- A. 40 pm
- B. 53 pm
- C. 37 pm
- D. 120 pm
Explanation
The atomic radius is a measure of the size of an atom. It is the distance from the nucleus to the outermost shell. The atomic radius of hydrogen is 53pm. It can be calculated from Bohr's formula given by : r = n2 0.529 Å / Z where r = radius of an atom n = principal quantum number of an orbit Z= atomic number Å= 10-10 metre
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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